2019 991.2 Turbo S weight loss plan.
#106
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#107
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#108
#109
Burning Brakes
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WOW. Mine is heavy. After removing sunroof, taking seats out and adding CF Race Tech buckets, 19’ lighter wheels, removing rear wing, front wing and fenders and changing with cup parts, exhaust, suspension, etc she still weight full tank at 3,510lbs. only thing left to do is removing rear seats, removing insulation below carpet, and changing doors (this would require full cage)
My car is a non-sunroof. On its lightest spec, and 6 gallons of fuel it weighed 3,408 lbs on the SCCA scales. Where my car lost a lot of weight was on the exhaust system, back in 2017 it had Inconel Kline headers (I sold them), and I still have the lightest exhaust made for a TurboS, the Kline Inconel with 4 tubular silencers and no cats. My goal was to get the car to 3375 lbs with no fuel without touching the interior or the bodywork, and it actually got a little under the goal number.
Most monoball upgraded control arms are heavier than the stock parts (but also stronger). The body panels in the 991 Turbo S are very light, aluminum everywhere but the rear fenders and those you can't change.
I have seen 991 GT3RS at race shops in the 3300 and 3400 lbs range. Typical rear rollcages weigh around 65 lbs, with some exceeding 80 lbs, and few weighing under 50 lbs. Add harnesses and sub belt mounts, that's another 20+ lbs. On the GT3RS, the extended fuel tank is nearly 160 lbs when full. A GT3RS on steel brakes carries nearly a 46 lbs penalty over PCCB. Most tracked 991 GT3RS run the stock wheels, 20"/21" and plenty heavy. Bigger tires are heavy too.
At a track like Sebring, 100 lbs is a little over 1 sec gained per lap. To loose 10 lbs from where your car is would require the following:
1) removing all airbags
2) removing all the door and rear panels
3) removing the rear seats
4) removing all the carpets
5) removing the glovebox
6) removing the PCM
All this for a little over 100 lbs reduction. The A/C removal, including condenser, all aluminum lines, blower and controls is just 26 lbs.
At a track like Sebring, you can drop the same 1sec a lap with another 90whp, so add the larger VTG and re-tune.
...or simply get familiar with the car, work on getting the most out of it, and have a Pro driver take it out for a few laps, then you run your laps and look at the time difference, that's the difference we usually have to work with.
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#110
Racer
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100% right. That's the best way to get to drop time. Only thing not mentioned is loosing some personal lbs. Based on your math i should be able to gain .3 seconds if i watch what I eat!!!! and cheaper
#112
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sorry, wrong thread! (but free bump!)
Last edited by pfbz; 12-26-2021 at 01:05 AM.
#113
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Underrated thread so il update with my findings.
17 porsche turbo S with Sunroof
never got a baseline but nonetheless, we did the following mods:
lightweight AG battery - saving of 41lbs
removal of all tools and extinguisher - 13lbs
removal of wiper fluid - 10lbs
Catless exhaust - saving of 25lb
2 Tillett B1 carbon buckets with lightweight bracket and sliders - 34 lbs (saving of 94lbs)
Removal of back seats - 20lbs
things that added weight back:
Big intercoolers
meth kit/pump
the car now weighs 3447 lbs with half a tank of fuel and a full tank of methanol (2.5 gals)
Id like to add some BBS but only if i found them used for a decent price
happy to contribute and enjoyed reading this post
17 porsche turbo S with Sunroof
never got a baseline but nonetheless, we did the following mods:
lightweight AG battery - saving of 41lbs
removal of all tools and extinguisher - 13lbs
removal of wiper fluid - 10lbs
Catless exhaust - saving of 25lb
2 Tillett B1 carbon buckets with lightweight bracket and sliders - 34 lbs (saving of 94lbs)
Removal of back seats - 20lbs
things that added weight back:
Big intercoolers
meth kit/pump
the car now weighs 3447 lbs with half a tank of fuel and a full tank of methanol (2.5 gals)
Id like to add some BBS but only if i found them used for a decent price
happy to contribute and enjoyed reading this post
Last edited by DubaiPorsche; 04-02-2022 at 08:55 AM.
#114
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Underrated thread so il update with my findings.
17 porsche turbo S with Sunroof
never got a baseline but nonetheless, we did the following mods:
lightweight AG battery - saving of 41lbs
removal of all tools and extinguisher - 13lbs
removal of wiper fluid - 10lbs
Catless exhaust - saving of 25lb
2 Tillett B1 carbon buckets with lightweight bracket and sliders - 34 lbs (saving of 94lbs)
Removal of back seats - 20lbs
things that added weight back:
Big intercoolers
meth kit/pump
the car now weighs 3447 lbs with half a tank of fuel and a full tank of methanol (2.5 gals)
Id like to add some BBS but only if i found them used for a decent price
happy to contribute and enjoyed reading this post
17 porsche turbo S with Sunroof
never got a baseline but nonetheless, we did the following mods:
lightweight AG battery - saving of 41lbs
removal of all tools and extinguisher - 13lbs
removal of wiper fluid - 10lbs
Catless exhaust - saving of 25lb
2 Tillett B1 carbon buckets with lightweight bracket and sliders - 34 lbs (saving of 94lbs)
Removal of back seats - 20lbs
things that added weight back:
Big intercoolers
meth kit/pump
the car now weighs 3447 lbs with half a tank of fuel and a full tank of methanol (2.5 gals)
Id like to add some BBS but only if i found them used for a decent price
happy to contribute and enjoyed reading this post
thanks for sharing
#115
Rennlist Member
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Underrated thread so il update with my findings.
17 porsche turbo S with Sunroof
never got a baseline but nonetheless, we did the following mods:
lightweight AG battery - saving of 41lbs
removal of all tools and extinguisher - 13lbs
removal of wiper fluid - 10lbs
Catless exhaust - saving of 25lb
2 Tillett B1 carbon buckets with lightweight bracket and sliders - 34 lbs (saving of 94lbs)
Removal of back seats - 20lbs
...
happy to contribute and enjoyed reading this post
17 porsche turbo S with Sunroof
never got a baseline but nonetheless, we did the following mods:
lightweight AG battery - saving of 41lbs
removal of all tools and extinguisher - 13lbs
removal of wiper fluid - 10lbs
Catless exhaust - saving of 25lb
2 Tillett B1 carbon buckets with lightweight bracket and sliders - 34 lbs (saving of 94lbs)
Removal of back seats - 20lbs
...
happy to contribute and enjoyed reading this post
#116
#117
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Thread Starter
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18’s
#120
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Hard to believe the back seat removal only saves 20 lbs.
Just my rear seat back feels like more than that when I fold it down.
Are u putting in a GT3 carpet set with rear seat delete?
Why not just leave your lithium battery in?
Just my rear seat back feels like more than that when I fold it down.
Are u putting in a GT3 carpet set with rear seat delete?
Why not just leave your lithium battery in?
Last edited by PCA1983; 07-10-2022 at 10:12 PM.